| 基于调制FFT有限域搜索的MUSIC频率估计算法 |
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| 引用本文： | 李彤,唐银辉,柳平.基于调制FFT有限域搜索的MUSIC频率估计算法[J].装甲兵工程学院学报,2010,24(3). |
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| 作者姓名： | 李彤 唐银辉 柳平 |
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| 作者单位： | 装甲兵工程学院,信息工程系,北京100072 |
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| 摘 要： | 为满足跳频频率测量中频率估计高精度及实时性的要求,提出了一种将调制FFT和MUSIC算法相结合的频率算法:首先利用调制FFT对谐波频率进行预估计,确定感兴趣的频域区间;然后利用MUSIC算法在锁定区间内估计伪谱谱峰的位置,实现频率的精确估计。该算法可得到较高的频率分辨率,并减少了MUSIC算法的谱峰搜索范围。仿真试验表明:该算法的频率分辨率高,且实时性能满足频率测量需求。
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| 关 键 词： | 频率估计 MUSIC算法 调制FFT 频率分辨率 |
MUSIC Frequency Estimation Algorithm Based on Modulation FFT Finite Search |
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| LI Tong,TANG Yin-hui,LIU Ping.MUSIC Frequency Estimation Algorithm Based on Modulation FFT Finite Search[J].Journal of Armored Force Engineering Institute,2010,24(3). |
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| Authors: | LI Tong TANG Yin-hui LIU Ping |
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| Institution: | LI Tong; TANG Yin-hui; LIU Ping(Department of Information Engineering; Academy of Armored Force Engineering; Beijing 100072; China); |
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| Abstract: | To meet the needs of high accuracy and real-time performance when estimating the hopping frequencies,an algorithm combining modulation FFT and MUSIC algorithm is proposed.After pre-estimating with modulation FFT,the interesting range frequency domain is determined,which MUSIC algorithm is used to search for spectral peak.This algorithm can achieve high frequency resolution and reduce the search range of MUSIC algorithm’s spectral peak.Simulation results show that this algorithm can achieve high frequency re... |
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| Keywords: | frequency estimation MUSIC algorithm modulation FFT frequency resolution |
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